"fitted on a diff from a scrapper vehicle to make things easier, googled tips on what to do, slight overfill of fluid and no washer used which may touch diff case, fantastic, no clicking at all unless going around a roundabout quickly or reversing, if driven with respect then you hardly no its on, it really is go anywhere and with one fitted a jimny without one would be left behind, out in a foot of snow on a 1:4 hill and not even a wheel spin or skid, stunning piece of kitt"